You will prepare and submit a term paper on Rainbows. Your paper should be a minimum of 1250 words in length. In science, various outstanding explanations exist about the rainbow. For example, a rainbow is an arc of concentric seven-coloured bands that develops when light from the sun interacts with raindrops. The light is refracted as it enters the raindrop causing different wavelengths of visible light to separate. Similarly, Bailey explains that the formation of the rainbow can be understood in the context of ray optics as resulting from light that is reflected internally once inside a liquid droplet (Bailey, 2004).
. . . . . . . . . . . All these explanations are tied together in the basic principles of refraction and reflection of light. Under these broad categories of properties of light, a proper understanding of the composition of white light and how the dispersion of light occurs is critical in understanding the principles behind the rainbow.
. . . . . . . . . . . White light is composed of seven colours, namely Red, Orange, Yellow, Green, Blue, Indigo and Violet, in order of the wavelength. Dispersion of white light is the process through which light is dissociated into its constituent seven colours (Duncan & Heather, 2001). Light enters the rain droplets and undergoes refraction. In the process, the seven colours of visible light are dissociated according to their wavelength. Red light with a longer wavelength is bent least compared to violet light with a shorter wavelength which is turned more. The red light appears at the top of the spectrum because it deviates least while the violet light appears at the bottom of the range because it is contrasted most. The other colours overlap within the scope but are conspicuous to the human eyes. As a result, a spectrum of colours is produced, explaining precisely how the rainbow is formed.
. . . . . . . . . . . Special optical devices such as the glass prisms can be used to understand the whole concept of rainbows, as shown in Figure 1. In the figure, white light enters the prism as shown in the diagram undergoes necessary refraction and produces a spectrum of colours as shown. This spectrum is made because of the fundamental concept that different colours in the white light respond differently to the glass material of the prism (Cutnell & Johnson, 2004).